<?php
$a=123;
if (isset($a)){
	echo $a;
}

unset($a);
if (isset($a)){
	echo $a;
}

$str="";
$str.="asdf";
$str.="TRFYGBHNJK"."<br>";
echo $str;

$arr=array(1,2,3,"asf");
$arr[4]="asdf";
$arr[6]="afd";
foreach ($arr as $i){
	echo  $i;
}
echo "<br>";
for ($i=0;$i<count($arr);++$i){
	echo $i." ".$arr[$i]."<br>";
}
echo $arr[6];
